Introduction

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Figure 1: California Spiny Lobsters off Anacapa Island. Photographer: Ed Bierman.

Figure 1: California Spiny Lobsters off Anacapa Island. Photographer: Ed Bierman.

Data & Methods

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Results

1. Annual lobster abundance by site, 2012-2018

Analysis: Figure 2 demonstrates varying trends in lobster abundance among the 5 collection sites. At Isla Vista and Naples, both located within Marine Protected Areas, trends year-over-year change. Both MPA sites saw spikes in 2015, declines in 2016 followed by increases in population. At non-MPA sites, counts are highly variable and characteristics between sites are not shared. At Arroyo Quemado, lobster counts remained relatively stable over the studied time period. At Carpinteria, a major spike in lobster abundance (2017) was followed by a major decline (2018). At Mohawk, a spike in abundance in 2015 gives way to stability into 2018.

Figure 2: Year-over-year change, lobsters counted in 5 Santa Barbara Channel sites, 2012-2018. Annual lobsters counts based on data collected by divers before the start of fishing season in late summer at five sites, two of which (Isla Vista and Naples) are within Marine Protected Areas (MPA). Interactive; double-click on individual site within legend to highlight. Single-click and unclick sites to toggle visibility and compare site data.

2. Lobster size: 2012 to 2018

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Figure 3: Add figure caption here

3. Analysis of lobsters in marine protected areas versus non-protected areas

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Summary

References

Reed D. 2019. SBC LTER: Reef: Abundance, size and fishing effort for California Spiny Lobster (Panulirus interruptus), ongoing since 2012. Environmental Data Initiative. Dataset accessed 10/30/2019.